1) -9х + (14+6х) = 11-х
-9х +14 +6х +х = 11
-9х + 6х +х = 11 - 14
-2х = -3
-2х = - 3
х=1,5
2) 4х+2(х-5) = 3х -13
4х +2х -10 = 3х -13
4х+2х-3х = -13 +10
3х = -3
х = -1
1) y=2x-1
x 0 1
y -1 1
y(0)= 2*0-1= -1
y(1)= 2*1-1=1
2) y+x=4
y=4-x
x 0 2
y 4 2
y(0)=4-0=4
y(2)=4-2=2
А теперь черти график)
D=4^2-4*4=0
X=4^2/2=16/2=8
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